Quick air filter and Throttle Body question

[DDonnie]

I'm ashamed to say I've never changed my own air filter as i always have them do it when i get an oil change. Does this look like it needs to be changed?

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Also, should my throttle body be this far open with the engine off?

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currently getting about 13 mpg city and hoping i can save a few mpg...

 

[barron03]

Take it off and check the other side.

 

[BRomanJr]

I'm ashamed to say I've never changed my own air filter as i always have them do it when i get an oil change. Does this look like it needs to be changed?

View attachment 13486

Also, should my throttle body be this far open with the engine off?

View attachment 13487

currently getting about 13 mpg city and hoping i can save a few mpg...

Does not look bad to me, paper is mostly clean and white. The filter condition is subjective, replace when "dirty". If you tap it on a bench and lots of dirt falls off, it's dirty.

It is normal for a vehicle with a 'Drive By Wire' (DBW) throttle body to be that far open because there is no separate air bleed for idle.
On cable operated throttle bodies there is an Idle Air Control (IAC) to manage the proper idle air flow and throttle plate can stay closed/nearly closed at idle.

You can check the cleanliness of the Throttle Body if you want but the V8 does not "dirty it up" like the I6.


I would look elsewhere for MPG problems (if there really is one, that city mileage while coming out of winter does not sound like a problem). What recent maintenance has been done?

 

[DDonnie]

I just bought it a month ago, so i'm not sure on the maintenance.Although this last tank did have a bottle of gumout fuel system cleaner in it. I went ahead and did the air filter and throttle body because who knows when the last time either was cleaned/changed and there are 90k miles on the truck. I don't really think there is a mpg "problem" per say, i just want to make sure everything is in tip top shape. I plan to get 250k on this beast.

 

[yodaddy4200]

You really should just pick up a K&N. I was worried about that lil pos falling off and sucking up shit!! K&N has a hose clamp its not coming off! i got mine at oreilly's for $65 probably could have found one cheaper but never looked. BTW your filter isnt to bad but id change it soon! You should get a couple mpg's with one also!!

 

[The_Roadie]

1) K&N is not universally worshipped. I took mine off as soon as I understood WHY it had a higher flow. (It lets more stuff through.)

2) If you don't know the maintenance history, be super suspicious that the previous owner failed to change the transfer case fluid at 50K as required. It can cost you a transfer case to assume it will last until 100K or more.

 

[yodaddy4200]

1) K&N is not universally worshipped. I took mine off as soon as I understood WHY it had a higher flow. (It lets more stuff through.)

2) If you don't know the maintenance history, be super suspicious that the previous owner failed to change the transfer case fluid at 50K as required. It can cost you a transfer case to assume it will last until 100K or more.

Im sure its got to be better than the little bullshit paper thing is all im saying!! What did you switch to if you dont mind me asking?

 

[DDonnie]

Fram. Roadie, planning to do a drain and fill this summer

 

[The_Roadie]

Im sure its got to be better than the little bullshit paper thing is all im saying!!

You can do the research very easily, but in general K&N sells Kool-aid, and a lot of people drink it. The vendors of throttle body spacers also don't seem to be going out of business, but they deserve to. As Ronny Raygunz said: "Trust.....but verify."

 

[DDonnie]

You can do the research very easily, but in general K&N sells Kool-aid, and a lot of people drink it. The vendors of throttle body spacers also don't seem to be going out of business, but they deserve to. As Ronny Raygunz said: "Trust.....but verify."

What filters would you recommend then?

 

[Sparky]

Im sure its got to be better than the little bullshit paper thing is all im saying!! What did you switch to if you dont mind me asking?

It actually isn't. The stock paper filter actually filters BETTER than K&N. K&N air filters will never touch my vehicle

The filter also won't fall off the intake tube as the airbox helps hold it in place anyway.